14781-45-4Relevant articles and documents
Structures of anhydrous and hydrated copper(II) hexafluoroacetylacetonate
Maverick, Andrew W.,Fronczek, Frank R.,Maverick, Emily F.,Billodeaux, Damon R.,Cygan, Zuzanna T.,Isovitsch, Ralph A.
, p. 6488 - 6492 (2002)
Crystal structure analyses are reported for anhydrous copper(II) hexafluoroacetylacetonate (Cu(hfac)2) and for two of its hydrates. The anhydrous compound (Cu(hfac)2, 1: P1; at 100 K, a = 5.428(1), b = 5.849(1), c = 11.516(3) A; α = 81.47(2), β = 74.57(2), γ = 86.96(2)°; Z = 1) contains centrosymmetric square-planar complexes with close intermolecular Cu···F contacts. The geometry of the complex is similar to that previously reported for Cu(hfac)2· toluene. The monoaquo compound (Cu(hfac)2(H2O), 2: P21/c; at 100 K, a = 10.8300(8), b = 6.5400(6), c = 21.551(3) A; β = 90.282(8)°; Z = 4) consists of square-pyramidal molecules with apical H2O ligands, and close-lying F atoms in the sixth coordination sites. The major difference between this structure and the two other polymorphs previously reported is the nature and direction of hydrogen bonds. The yellow-green solid formed from Cu(hfac)2 with excess H2O is identified as the trihydrate. In crystalline form it is the previously unreported [trans-Cu(hfac)2-(H2O)2] ·H2O (3: P1; at 150 K, a = 8.3899(3), b = 9.6011(3), c = 11.4852(4) A; α = 72.397(2), β = 79.161(2), γ = 87.843(2)°; Z = 2). There is no conclusive evidence in favor of any solid with the composition Cu(hfac)2· 2H2O.
Copper(II) complex with acetylacetone phenylhydrazone: Synthesis, crystal structure, and thermal stability
Kuz'mina,Eliseeva,Balashov,Troyanov
, p. 1182 - 1186 (2008/10/08)
The Cu(phac)2 complex was synthesized by the reaction of copper(II) acetate with acetylacetone phenylhydrazone (Hphac), and its crystal structure was established by X-ray diffraction: space group P21/c, a = 11.173(3) ?, b = 8.267(2) ?, c = 12.633(4) ?, β = 115.01(3)°, V = 1057.5(5) ?3, Z = 4, R1 = 0.0476. The crystal structure of Cu(phac)2 consists of the centrosymmetrical mononuclear molecules. The central copper(II) ion is coordinated by two oxygen atoms and two nitrogen atoms of two acetylacetone phenylhydrazone ligands. The Cu(phac)2 molecules are linked in layers parallel to the Oyz plane. The oxygen atoms of the ketone fragment are involved in intermolecular bonding, which completes the coordination sphere of the central copper(II) ion to a substantially elongated octahedron. The thermal stability of the Cu(phac)2 complex was estimated under nitrogen at atmospheric pressure and in vacuo.
